Method of producing aluminium nitrids.



EZETHUB 323 PEJQTCIUQ.

SWITZERLAND.

hppiication filed i To all whom it may concern:

Be it known that i, C'TTQE' (loctor oi chemistry, sub ect o;

peror of Austria-P or 1mg ow and clulein, Switzerland, have invented lui improvements in ivlethoals ing Aluminum Nl DI'ltlS, of which inis specification.

" inventi zin relates to the v Wuminum nitiicls and 0.: int i 11 wing manner: A pomlereil in liilfieL, carbon and a metal, i

The temperature to he obtained must he so high that, t no nitrogen present, the

mriinl l'orniation of an nl o'y of aluminum and iron or copper would he initiated. Such 2i tzmpei'sture is obtain ail at rerlheat, for instance by a. coke The tQII'IPEFEZ-ZUY-Q in question only to be maintained for short time, nominee after the fornnition of the alloy of aluminum and copper or iron has begun, the chemical remtion itself deveiops a. high tninperature, so that it is no ionger necessary to hunt the mixture by the eolre or other tire to such an extent as in the beginning of the process.

The mixture to be treated contains pre nruhly three parts of alumina and one part or n. little more of carbon, and themetols Patented ma 18, 1908.

innntionetl are to beadded in a quantity of about o 'IhereTmoy he admixed one single metal or a mixture of two or more metziis.

The mass thus produced contains almost pure aluminum nitrids with only an insigiiifieant amount of aluminum carbid, the further treatment oi which may be (uspensed with.

{mid such as hydrochloric acid dioxitl may be advantageously l to the nitrogen, whereby the formai aluminum nitriils is facilitated. In 1 case the nitrogen contains about onetenlh of or cent. of a'cidgas.

e method of )roduoing aluminum which consists in heating a mixture formin slloy with aluminum in on atmosphere eOntaining nitrogen to red heat, substantially as described.

The method of producing aluminum nitritls which consists in heating a mixture of alumina, carbon and a. metol capable of forming an alloy with aluminum in an atmosphere containing nitrogen and an acid gas to red heat, substantially as described.

In tes .imony whereof I have signed mynome to this specification nthe presence of two subscribing Witnesses.

OTTOKAR SERPEK.

Witnesses:

A. Linnnnxuncnr, Enemi- TRATE.

slunnna, carbon and a metal capable of I 

